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. 2022 Jun 21;14(13):2528. doi: 10.3390/polym14132528

Figure 5.

Figure 5

ATR-IR results of plasma-treated and untreated PET films: (A) Full IR spectra for the three samples, (B) Carbonyl region spectra (1650–1750 cm−1), and (C) Integrated peak area of carbonyl region.